From a5b7f032cf57960dfe0e1e5f5fab74b69d7cf345 Mon Sep 17 00:00:00 2001
From: Bernhard Bonigl <bernhard.bonigl@gmail.com>
Date: Mon, 17 Oct 2016 18:48:37 +0200
Subject: [PATCH] Add the extra heart rendering from 1.7 TiC

---
 src/main/java/slimeknights/mantle/Mantle.java |  10 +
 .../client/ExtraHeartRenderHandler.java       | 246 ++++++++++++++++++
 .../assets/mantle/textures/gui/absorb.png     | Bin 0 -> 5893 bytes
 .../assets/mantle/textures/gui/hearts.png     | Bin 0 -> 5828 bytes
 4 files changed, 256 insertions(+)
 create mode 100644 src/main/java/slimeknights/mantle/client/ExtraHeartRenderHandler.java
 create mode 100644 src/main/resources/assets/mantle/textures/gui/absorb.png
 create mode 100644 src/main/resources/assets/mantle/textures/gui/hearts.png

diff --git a/src/main/java/slimeknights/mantle/Mantle.java b/src/main/java/slimeknights/mantle/Mantle.java
index 8628f564..8e245d13 100644
--- a/src/main/java/slimeknights/mantle/Mantle.java
+++ b/src/main/java/slimeknights/mantle/Mantle.java
@@ -1,13 +1,16 @@
 package slimeknights.mantle;
 
+import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.Instance;
 import net.minecraftforge.fml.common.SidedProxy;
+import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import slimeknights.mantle.client.ExtraHeartRenderHandler;
 import slimeknights.mantle.common.CommonProxy;
 
 /**
@@ -41,4 +44,11 @@ public class Mantle {
   public void preInit(FMLPreInitializationEvent event){
     proxy.preInit();
   }
+
+  @Mod.EventHandler
+  public void postInit(FMLPostInitializationEvent event) {
+    if(event.getSide().isClient()) {
+      MinecraftForge.EVENT_BUS.register(new ExtraHeartRenderHandler());
+    }
+  }
 }
diff --git a/src/main/java/slimeknights/mantle/client/ExtraHeartRenderHandler.java b/src/main/java/slimeknights/mantle/client/ExtraHeartRenderHandler.java
new file mode 100644
index 00000000..fd4b3f4c
--- /dev/null
+++ b/src/main/java/slimeknights/mantle/client/ExtraHeartRenderHandler.java
@@ -0,0 +1,246 @@
+package slimeknights.mantle.client;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.Gui;
+import net.minecraft.client.gui.ScaledResolution;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.entity.SharedMonsterAttributes;
+import net.minecraft.entity.ai.attributes.IAttributeInstance;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.init.MobEffects;
+import net.minecraft.potion.PotionEffect;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.MathHelper;
+import net.minecraftforge.client.GuiIngameForge;
+import net.minecraftforge.client.event.RenderGameOverlayEvent;
+import net.minecraftforge.fml.common.eventhandler.EventPriority;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+import java.util.Random;
+
+import slimeknights.mantle.Mantle;
+
+@SideOnly(Side.CLIENT)
+public class ExtraHeartRenderHandler {
+  private static final ResourceLocation ICON_HEARTS = new ResourceLocation(Mantle.modId, "textures/gui/hearts.png");
+  private static final ResourceLocation ICON_ABSORB = new ResourceLocation(Mantle.modId, "textures/gui/absorb.png");
+  private static final ResourceLocation ICON_VANILLA = Gui.ICONS;
+
+  private final Minecraft mc = Minecraft.getMinecraft();
+
+  private int updateCounter = 0;
+  private int playerHealth = 0;
+  private int lastPlayerHealth = 0;
+  private long healthUpdateCounter = 0;
+  private long lastSystemTime = 0;
+  private Random rand = new Random();
+
+  private int height;
+  private int width;
+  private int regen;
+
+  private static int left_height = 39;
+
+  public void drawTexturedModalRect(int x, int y, int textureX, int textureY, int width, int height) {
+    Minecraft.getMinecraft().ingameGUI.drawTexturedModalRect(x, y, textureX, textureY, width, height);
+  }
+
+  /* HUD */
+  @SubscribeEvent(priority = EventPriority.LOW)
+  public void renderHealthbar(RenderGameOverlayEvent.Pre event) {
+    if(event.getType() != RenderGameOverlayEvent.ElementType.HEALTH || event.isCanceled()) {
+      return;
+    }
+    // extra setup stuff from us
+    left_height = 39;
+    ScaledResolution resolution = event.getResolution();
+    width = resolution.getScaledWidth();
+    height = resolution.getScaledHeight();
+    event.setCanceled(true);
+    updateCounter = mc.ingameGUI.getUpdateCounter();
+
+    // start default forge/mc rendering
+    // changes are indicated by comment
+    mc.mcProfiler.startSection("health");
+    GlStateManager.enableBlend();
+
+    EntityPlayer player = (EntityPlayer)this.mc.getRenderViewEntity();
+    int health = MathHelper.ceiling_float_int(player.getHealth());
+    boolean highlight = healthUpdateCounter > (long)updateCounter && (healthUpdateCounter - (long)updateCounter) / 3L %2L == 1L;
+
+    if (health < this.playerHealth && player.hurtResistantTime > 0)
+    {
+      this.lastSystemTime = Minecraft.getSystemTime();
+      this.healthUpdateCounter = (long)(this.updateCounter + 20);
+    }
+    else if (health > this.playerHealth && player.hurtResistantTime > 0)
+    {
+      this.lastSystemTime = Minecraft.getSystemTime();
+      this.healthUpdateCounter = (long)(this.updateCounter + 10);
+    }
+
+    if (Minecraft.getSystemTime() - this.lastSystemTime > 1000L)
+    {
+      this.playerHealth = health;
+      this.lastPlayerHealth = health;
+      this.lastSystemTime = Minecraft.getSystemTime();
+    }
+
+    this.playerHealth = health;
+    int healthLast = this.lastPlayerHealth;
+
+    IAttributeInstance attrMaxHealth = player.getEntityAttribute(SharedMonsterAttributes.MAX_HEALTH);
+    float healthMax = (float)attrMaxHealth.getAttributeValue();
+    float absorb = MathHelper.ceiling_float_int(player.getAbsorptionAmount());
+
+    // CHANGE: simulate 10 hearts max if there's more, so vanilla only renders one row max
+    healthMax = Math.min(healthMax, 20f);
+    health = Math.min(health, 20);
+    absorb = Math.min(absorb, 20);
+
+    int healthRows = MathHelper.ceiling_float_int((healthMax + absorb) / 2.0F / 10.0F);
+    int rowHeight = Math.max(10 - (healthRows - 2), 3);
+
+    this.rand.setSeed((long)(updateCounter * 312871));
+
+    int left = width / 2 - 91;
+    int top = height - left_height;
+    left_height += (healthRows * rowHeight);
+    if (rowHeight != 10) left_height += 10 - rowHeight;
+
+    regen = -1;
+    if (player.isPotionActive(MobEffects.REGENERATION))
+    {
+      regen = updateCounter % 25;
+    }
+
+    final int TOP =  9 * (mc.theWorld.getWorldInfo().isHardcoreModeEnabled() ? 5 : 0);
+    final int BACKGROUND = (highlight ? 25 : 16);
+    int MARGIN = 16;
+    if (player.isPotionActive(MobEffects.POISON))      MARGIN += 36;
+    else if (player.isPotionActive(MobEffects.WITHER)) MARGIN += 72;
+    float absorbRemaining = absorb;
+
+    for (int i = MathHelper.ceiling_float_int((healthMax + absorb) / 2.0F) - 1; i >= 0; --i)
+    {
+      //int b0 = (highlight ? 1 : 0);
+      int row = MathHelper.ceiling_float_int((float)(i + 1) / 10.0F) - 1;
+      int x = left + i % 10 * 8;
+      int y = top - row * rowHeight;
+
+      if (health <= 4) y += rand.nextInt(2);
+      if (i == regen) y -= 2;
+
+      drawTexturedModalRect(x, y, BACKGROUND, TOP, 9, 9);
+
+      if (highlight)
+      {
+        if (i * 2 + 1 < healthLast)
+          drawTexturedModalRect(x, y, MARGIN + 54, TOP, 9, 9); //6
+        else if (i * 2 + 1 == healthLast)
+          drawTexturedModalRect(x, y, MARGIN + 63, TOP, 9, 9); //7
+      }
+
+      if (absorbRemaining > 0.0F)
+      {
+        if (absorbRemaining == absorb && absorb % 2.0F == 1.0F)
+        {
+          drawTexturedModalRect(x, y, MARGIN + 153, TOP, 9, 9); //17
+          absorbRemaining -= 1.0F;
+        }
+        else
+        {
+          drawTexturedModalRect(x, y, MARGIN + 144, TOP, 9, 9); //16
+          absorbRemaining -= 2.0F;
+        }
+      }
+      else
+      {
+        if (i * 2 + 1 < health)
+          drawTexturedModalRect(x, y, MARGIN + 36, TOP, 9, 9); //4
+        else if (i * 2 + 1 == health)
+          drawTexturedModalRect(x, y, MARGIN + 45, TOP, 9, 9); //5
+      }
+    }
+
+
+    renderExtraHearts(left, top, player);
+    renderExtraAbsorption(left, top - rowHeight, player);
+
+
+    this.mc.getTextureManager().bindTexture(ICON_VANILLA);
+    GuiIngameForge.left_height += 10;
+    if(absorb > 0) {
+      GuiIngameForge.left_height += 10;
+    }
+
+    event.setCanceled(true);
+
+    GlStateManager.disableBlend();
+    mc.mcProfiler.endSection();
+  }
+
+  private void renderExtraHearts(int xBasePos, int yBasePos, EntityPlayer player) {
+    int potionOffset = getPotionOffset(player);
+
+    // Extra hearts
+    this.mc.getTextureManager().bindTexture(ICON_HEARTS);
+
+    int hp = MathHelper.ceiling_float_int(player.getHealth());
+    renderCustomHearts(xBasePos, yBasePos, potionOffset, hp, false);
+  }
+
+  private void renderCustomHearts(int xBasePos, int yBasePos, int potionOffset, int count, boolean absorb) {
+    int regenOffset = absorb ? 10 : 0;
+    for(int iter = 0; iter < count / 20; iter++) {
+      int renderHearts = (count - 20 * (iter + 1)) / 2;
+      if(renderHearts > 10) {
+        renderHearts = 10;
+      }
+      for(int i = 0; i < renderHearts; i++) {
+        int y = 0;
+        if(i + regenOffset == regen) {
+          y -= 2;
+        }
+        if(absorb) {
+          this.drawTexturedModalRect(xBasePos + 8 * i, yBasePos + y, 0, 54, 9, 9);
+        }
+        this.drawTexturedModalRect(xBasePos + 8 * i, yBasePos + y, 0 + 18 * iter, potionOffset, 9, 9);
+      }
+      if(count % 2 == 1 && renderHearts < 10) {
+        if(absorb) {
+          this.drawTexturedModalRect(xBasePos + 8 * renderHearts, yBasePos, 0, 54, 9, 9);
+        }
+        this.drawTexturedModalRect(xBasePos + 8 * renderHearts, yBasePos, 9 + 18 * iter, potionOffset, 9, 9);
+      }
+    }
+  }
+
+  private int getPotionOffset(EntityPlayer player) {
+    int potionOffset = 0;
+    PotionEffect potion = player.getActivePotionEffect(MobEffects.WITHER);
+    if(potion != null) {
+      potionOffset = 18;
+    }
+    potion = player.getActivePotionEffect(MobEffects.POISON);
+    if(potion != null) {
+      potionOffset = 9;
+    }
+    if(mc.theWorld.getWorldInfo().isHardcoreModeEnabled()) {
+      potionOffset += 27;
+    }
+    return potionOffset;
+  }
+
+  private void renderExtraAbsorption(int xBasePos, int yBasePos, EntityPlayer player) {
+    int potionOffset = getPotionOffset(player);
+
+    // Extra hearts
+    this.mc.getTextureManager().bindTexture(ICON_ABSORB);
+
+    int absorb = MathHelper.ceiling_float_int(player.getAbsorptionAmount());
+    renderCustomHearts(xBasePos, yBasePos, potionOffset, absorb, true);
+  }
+}
diff --git a/src/main/resources/assets/mantle/textures/gui/absorb.png b/src/main/resources/assets/mantle/textures/gui/absorb.png
new file mode 100644
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